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- Don't call IoCompleteRequest while holding a spin lock because it can cause deadlocks

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svn path=/branches/aicom-network-fixes/; revision=36102
This commit is contained in:
Cameron Gutman
2008-09-10 04:59:12 +00:00
parent e39210e30a
commit 8cf22aef05
1 changed files with 14 additions and 3 deletions
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drivers/network/afd/afd/select.c
+14 -3
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@@ -86,8 +86,6 @@ static VOID SignalSocket(
}
UnlockHandles( AFD_HANDLES(PollReq), PollReq->HandleCount );
if( Irp->MdlAddress ) UnlockRequest( Irp, IoGetCurrentIrpStackLocation( Irp ) );
AFD_DbgPrint(MID_TRACE,("Completing\n"));
IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
AFD_DbgPrint(MID_TRACE,("Done\n"));
}
@@ -113,6 +111,8 @@ static VOID SelectTimeout( PKDPC Dpc,
SignalSocket( Poll, NULL, PollReq, STATUS_TIMEOUT );
KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
AFD_DbgPrint(MID_TRACE,("Timeout\n"));
}
@@ -146,6 +146,9 @@ VOID KillSelectsForFCB( PAFD_DEVICE_EXTENSION DeviceExt,
(!OnlyExclusive || (OnlyExclusive && Poll->Exclusive)) ) {
ZeroEvents( PollReq->Handles, PollReq->HandleCount );
SignalSocket( Poll, NULL, PollReq, STATUS_SUCCESS );
KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
}
}
}
@@ -230,6 +233,9 @@ AfdSelect( PDEVICE_OBJECT DeviceObject, PIRP Irp,
Status = STATUS_SUCCESS;
Irp->IoStatus.Status = Status;
SignalSocket( NULL, Irp, PollReq, Status );
KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
return Status;
} else {
PAFD_ACTIVE_POLL Poll = NULL;
@@ -383,6 +389,7 @@ VOID PollReeval( PAFD_DEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject ) {
KIRQL OldIrql;
PAFD_POLL_INFO PollReq;
PKEVENT EventSelect = NULL;
PIRP Irp;
AFD_DbgPrint(MID_TRACE,("Called: DeviceExt %x FileObject %x\n",
DeviceExt, FileObject));
@@ -412,13 +419,17 @@ VOID PollReeval( PAFD_DEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject ) {
while( ThePollEnt != &DeviceExt->Polls ) {
Poll = CONTAINING_RECORD( ThePollEnt, AFD_ACTIVE_POLL, ListEntry );
PollReq = Poll->Irp->AssociatedIrp.SystemBuffer;
Irp = Poll->Irp;
PollReq = Irp->AssociatedIrp.SystemBuffer;
AFD_DbgPrint(MID_TRACE,("Checking poll %x\n", Poll));
if( UpdatePollWithFCB( Poll, FileObject ) ) {
ThePollEnt = ThePollEnt->Flink;
AFD_DbgPrint(MID_TRACE,("Signalling socket\n"));
SignalSocket( Poll, NULL, PollReq, STATUS_SUCCESS );
KeReleaseSpinLock( &DeviceExt->Lock, OldIrql );
IoCompleteRequest( Irp, IO_NETWORK_INCREMENT );
KeAcquireSpinLock( &DeviceExt->Lock, &OldIrql );
} else
ThePollEnt = ThePollEnt->Flink;
}